Question 1018964
{{{4x^2-12x+k}}}
{{{(2x-b)(2x-b)}}}
{{{2*x*2*x-2bx-2bx+b^2}}}
{{{4x^2-4bx+b^2}}}


Corresponding positions for the expression in the same form:
{{{-4b=-12}}}  and {{{b^2=k}}}.


{{{highlight_green(b=3)}}}

-

{{{highlight(k=9)}}}